In my two years doing surveys with Rewards Central I earned $20 and an unstoppable amount of spam. The website itself is fine other then the crap pay you get. However - I have found out this is a perfect growing grounds for marketers who want to put people on mailing lists. For example - you're asked to do a survey for a pharmacy drug then you get constantly spammed from them. I closed my profile with Rewards Central over a year ago and still get the spam!